Packet Scheduling Algorithm For The Cdma Cellular Communication System

With the phenomenal growth of mobile and Internet users, the emerging popularity of multimedia applications and the increasing demand of QoS guarantee, how to management and utilize scarce radio resource has become one of the most concerned issues for operators. How to keep QoS of heterogeneous services and at the meantime utilize the scarce radio spectrum resources is the challenging for 3rd generation mobile communication systems and future personal communication systems, especially in error-prone wireless channel and under the situation of user's mobility and their interfering with each other. Radio Resource Management (RRM), which has been brought forward as a key technology, is an important performance index to weigh the feasibility of a standard and whether it can be accepted by operators or not. Because that future mobile communication system is based on data traffic, wireless packet scheduling algorithm, which management radio resource for data traffic, is an important component of RRM. This dissertation studies the packet scheduling in CDMA Cellular Communication Systems. Chapter 2 discusses typical wireless packet scheduling algorithms for CDMA systems in literatures and investigates their performance via simulations. We mainly evaluate the fairness and system throughput performance of the scheduling algorithms which support non-real-time services, and the packet delay performance and system throughput performance of the ones which support real-time services. The conclusions drawn from the simulation results are helpful for practical utilization. Chapter 3 proposes a novel wireless packet scheduling algorithm which we call it Fuzzy Rule based Opportunistic Scheduling (FROS). In order to provide QoS guarantee for multiple mobile users who share the same time-varying channel over high-speed downlink and at the meantime make the best use of multi-user diversity gain to improve the overall system performance, we first introduce fuzzy logic to wireless packet scheduling. FROS can strive for balance between packet delay performance and system throughput performance. An extensive simulation results prove that the proposed FROS algorithm are superior to the typical ones in current...